Associated Gen Contractors of Illinois

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Call One was incorporated in April of 1992 and has been included on Crains Chicago list of the fastest growing companies in the Chicago area. The company has since grown to become one of the nation's largest providers of voice, data, internet services, phone systems and equipment. They are committed to offering leading-edge technologies coupled with unparalleled service and were the first telecommunications provider to be certified as a Competitive Local Exchange Carrier by the Illinois Commerce Commission.

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